The more involved games come at a cost but it is usually nominal, a few dollars at the most and you have a unique game to keep the guests entertained. The best board games to be found are usually question and answer games, where the guests partner up and try to answer questions about the couple or each other for points or spaces on the printed out board. Many games are able to be customized so that you can enter specific questions about guests or the expectant parents to print out.
Look for ways to take some of the scare out of Halloween for young, impressionable guests. Printed material of any fun and fall nature will help since the lights need to be bright for these pages to be read. Older guests and teenagers often forget just how terrifying the world can be to the younger ones. Highlight the fun images of pumpkins and scarecrows while minimizing the scarier motifs when young children are present.